WorksheetsS3 - pH (up to Acids in Food Industry)
Total questions: 32
Worksheet time: 20mins
What colour would universal indicator be when mixed with a strong acid?
Blue
Red
Green
Purple
What colour would universal indicator be when mixed with a strong alkali?
Blue
Red
Green
Purple
What colour would universal indicator be when mixed with a distilled water?
Blue
Red
Green
Purple
What colour would universal indicator be when mixed with a weak alkali?
Blue
Red
Green
Purple
Universal indicator, when mixed with a strong acid, turns (a) in colour.
What pH is a strong alkali?
pH 1
pH 5
pH 7
pH 9
pH13
What pH is a strong acid?
pH 1
pH 5
pH 7
pH 9
pH13
What pH is a neutral?
pH 1
pH 5
pH 7
pH 9
pH13
What pH is a weak alkali?
pH 1
pH 5
pH 7
pH 9
pH13
What pH is a weak acid?
pH 1
pH 5
pH 7
pH 9
pH13
What method of testing pH involves added a small strip of paper to a solution and comparing the colour with a pH chart?
(a)
What method of testing pH involves inserting a probe into a solution and reading the digital value?
(a)
What would you use to measure pH by added drops and comparing to a colour chart?
(a)
An acidic gas that causes acid rain
Carbon monoxide
Nitrogen
Sulfur dioxide
Hydrogen
How does the pH of acid rain compare to that of normal rain?
(a)
Metal + oxygen ->
metal oxide
metal oxide + hydrogen
metal oxide + salt
metal hydroxide
Lithium + (a) -> Lithium oxide
Metal oxides are basic because .....
they form alkaline solutions
they form acidic solutions
they are simple
they are dull
When in solution metal oxides give a pH of .....
<7
7
3-9
>7
Insoluble metal oxides can change the colour of pH paper to
Red
Blue
No effect
Green
Soluble non-metal oxides dissolve in water to produce
neutral solutions
acids
universal indicators
alkalis
Soluble metal oxides dissolve in water to produce
neutral solutions
acids
universal indicators
alkalis
Which acid can be used in pickling. It is also used in flavourings and confectionary items.
Phosphoric acid
Citric acid
Fumaric acid
Ethanoic acid
Adds a sharp taste to sweets and cold drinks.
Phosphoric acid
Citric acid
Fumaric acid
Ethanoic acid
It is usually used in cheesecake mixes
(a)
Used for making drinks that have a low-calorie count.
(a)
Fizzy drinks are..?
acidic
alkaline
tangfastic haribo are..?
acidic
alkaline
Drain cleaner is an..?
acid
alkali
Lemon juice is an..?
acid
alkali
Oven cleaner is an..?
acid
alkali
